.clearfix() {
    &:before, &:after {
        content: " ";
        display: table;
    }
    &:after {
        clear: both;
    }
}

.user-select(@select) {
    -webkit-user-select: @select;
    -moz-user-select: @select;
    -ms-user-select: @select;
    user-select: @select;
}